Ronald,
This version is now merged into urllib and commited as revision
63159 in the trunk.
Ahh, sorry I'm late. I was on vacation last week when you posted
this. Here's an updated version with a bit less duplication (about 55
lines removed). This seems like it will be much easier to maintain
(IMHO).
Also, I'm sure you know what you're doing so I left the code as it
was, but this line (and other related lines) looked suspicious to me:
proxies["ftp"] = "http://%s:%i"; % (proxy, port)
Did you want the URL to be encoded with 'http://' on the front even
though it is an FTP proxy? If not, simply use this in the attached
script:
proxies[protocol] = "%s://%s:%i" % (protocol, proxy, port)
else:
proxies[protocol] = "%s://%s" % (protocol, proxy)
~ Daniel
def _CStringFromCFString(sc, value):
from ctypes import create_string_buffer
length = sc.CFStringGetLength(value) + 1
buff = create_string_buffer(length)
sc.CFStringGetCString(value, buff, length, 0)
return buff.value
def _CFNumberToInt32(sc, cfnum):
from ctypes import byref, c_int
val = c_int()
kCFNumberSInt32Type = 3
sc.CFNumberGetValue(cfnum, kCFNumberSInt32Type, byref(val))
return val.value
def proxybypass_macosx_sysconf(host):
"""
Return True iff this host shouldn't be accessed using a proxy
This function uses the MacOSX framework SystemConfiguration
to fetch the proxy information.
"""
from ctypes import cdll
from ctypes.util import find_library
import re
import socket
from fnmatch import fnmatch
def ip2num(ipAddr):
parts = ipAddr.split('.')
parts = map(int, parts)
if len(parts) != 4:
parts = (parts + [0, 0, 0, 0])[:4]
return (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8) | parts[3]
sc = cdll.LoadLibrary(find_library("SystemConfiguration"))
hostIP = None
if not sc:
return False
kSCPropNetProxiesExceptionsList = sc.CFStringCreateWithCString(0, "ExceptionsList", 0)
kSCPropNetProxiesExcludeSimpleHostnames = sc.CFStringCreateWithCString(0, "ExcludeSimpleHostnames", 0)
proxy_dict = sc.SCDynamicStoreCopyProxies(None)
try:
# Check for simple host names:
if '.' not in host:
exclude_simple = sc.CFDictionaryGetValue(proxy_dict, kSCPropNetProxiesExcludeSimpleHostnames)
if exclude_simple and _CFNumberToInt32(sc, exclude_simple):
return True
# Check the exceptions list:
exceptions = sc.CFDictionaryGetValue(proxy_dict, kSCPropNetProxiesExceptionsList)
if exceptions:
# Items in the list are strings like these: *.local, 169.254/16
for index in xrange(sc.CFArrayGetCount(exceptions)):
value = sc.CFArrayGetValueAtIndex(exceptions, index)
if not value: continue
value = _CStringFromCFString(sc, value)
m = re.match(r"(\d+(?:\.\d+)*)(/\d+)?", value)
if m is not None:
if hostIP is None:
hostIP = socket.gethostbyname(host)
hostIP = ip2num(hostIP)
base = ip2num(m.group(1))
mask = int(m.group(2)[1:])
mask = 32 - mask
if (hostIP >> mask) == (base >> mask):
return True
elif fnmatch(host, value):
return True
return False
finally:
sc.CFRelease(kSCPropNetProxiesExceptionsList)
sc.CFRelease(kSCPropNetProxiesExcludeSimpleHostnames)
def getproxies_macosx_sysconf():
"""Return a dictionary of scheme -> proxy server URL mappings.
This function uses the MacOSX framework SystemConfiguration
to fetch the proxy information.
"""
from ctypes import cdll
from ctypes.util import find_library
sc = cdll.LoadLibrary(find_library("SystemConfiguration"))
if not sc:
return {}
proxy_keys = [
("http", "HTTPEnable", "HTTPProxy", "HTTPPort"),
("https", "HTTPSEnable", "HTTPSProxy", "HTTPSPort"),
("ftp", "FTPEnable", "FTPProxy", "FTPPort"),
("gopher", "GopherEnable", "GopherProxy", "GopherPort"),
]
proxies = {}
proxy_dict = sc.SCDynamicStoreCopyProxies(None)
try:
for protocol, enabled_key, proxy_key, port_key in proxy_keys:
enabled_key = sc.CFStringCreateWithCString(0, enabled_key, 0)
proxy_key = sc.CFStringCreateWithCString(0, proxy_key, 0)
port_key = sc.CFStringCreateWithCString(0, port_key, 0)
try:
enabled = sc.CFDictionaryGetValue(proxy_dict, enabled_key)
if enabled and _CFNumberToInt32(sc, enabled):
proxy = sc.CFDictionaryGetValue(proxy_dict, proxy_key)
port = sc.CFDictionaryGetValue(proxy_dict, port_key)
if proxy:
proxy = _CStringFromCFString(sc, proxy)
if port:
port = _CFNumberToInt32(sc, port)
proxies[protocol] = "http://%s:%i"; % (proxy, port)
else:
proxies[protocol] = "http://%s"; % (proxy, )
finally:
sc.CFRelease(enabled_key)
sc.CFRelease(proxy_key)
sc.CFRelease(port_key)
finally:
sc.CFRelease(proxy_dict)
return proxies
print getproxies_macosx_sysconf()
print proxybypass_macosx_sysconf("169.254.10.10")
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